Chabot Smog
“This is the only place we trust with smog certifications for our vehicles.”
Best Car Inspection & Emissions Testing in Castro Valley, CA
15 stations listed · 5 in Castro Valley · 10 open weekends · 13 rated 4.5+ · 1 shows a license
Data verified October 16, 2026
Prime Automotive
“Since he knew replacing the suspension is costly, he gave us the most competitive rate and cleaned out the brake fluid while he was under there.”
Ace Auto Repair & Tire
“Ace Auto Repair has provided excellent service for my cars for over twenty years; on every occasion, they have been extremely professional, honest, helpful, fair, reliable and dependable.”
Smog World & Lube
“I thought the 70 dollar price was fair and comparable to any other smog station.”
Bestech Smog Check
“Quick, honest, to the point and honored his over the phone out the door price.”
Clean Air Auto Repair
“I got in and out in no time I will definitely return for service in the future”
Listed for drivers in and around Castro Valley, CA, these 15 shops carry out emissions and inspection work. What each one says about its station license, hours and retest policy comes from its own website; ratings and quotes come from public reviews.
Area overview: Castro Valley, CA
Of the 15 stations we list here, 5 are in Castro Valley itself and 10 come from towns including San Ramon (3, 8 mi), Oakland (3, 10 mi) and Dublin (1, 9 mi). The stations on this page are rated from 4.0 to 4.9 across 3,636 reviews; 14 have 50 or more reviews and 13 are rated 4.5 or higher. The topics that come up most in reviews of the stations on this page are "price", "estimates" and "quality". 10 are open on Saturdays and 1 on Sundays. The services the stations on this page list most often on their websites are diagnostics (3), brake repair (2), oil change (2) and tires & alignments (2). 1 shows a license on its website; 2 list staff certifications (ASE) and 5 have a BBB rating of A or A+. 10 have ten or more years of experience, the longest 56 years. 3 are family- or locally-owned and 8 list coupons or special offers. We have a website on file for 13 of the stations on this page; 10 publish a contact page; 2 list a public email and 2 take bookings online. We count these figures across the stations on this page; distances are straight-line, and hours and prices change, so confirm the details with the station before you visit.
Can I use a station outside Castro Valley?
Inside your own state, yes. 5 of the 15 shops here are in Castro Valley and the rest come from other towns. Crossing a state line does not work, because the test has to be accepted by the state that registers the car.
Sunny's Star Certified Smog & Repair
“I found this place of business to be honest, friendly, and professional, and the service was fast.”
4 Less Smog Check Station Oakland
“He made me feel like he appreciated me as a customer & for choosing his location.”
Costa Auto Care and Tire
“Fast, friendly, thorough and very professional in the care and service provided to me and my vehicle.”
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Star Smog
“I was able to book an appointment online which is so convenient and works well!”
Cosmic Automotive
“They found the noise that was coming from a loose bolt on front suspension and didn't even charge me for me.”
German Auto Service
“This was my second visit there and they're honest and good people.”
Dublin Automotive and Smog
“This place is awesome, fast and friendly staff, I'll be returning and recommending.”
San Ramon Valley Import Center
“I will continue to take my 10-year old SUV here.”
Auto Row Smog & Repair
“Had smog issues for a while but they were able to fix it the same day I brought it in.”
Why these companies made our list
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